Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 561 · 40 questions

What you do (Only the length matters): 1. Tie the nut to the string and hang it from the taped pencil, 30 cm long. 2. Pull it a little to one side and let go — do not push. 3. Time 10 swings and divide by 10. 4. Change only the string length (60 cm), time 10 swings again, and stand back from the bob.

1. 1.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a grandfather clock (d) a digital watch
2. 2.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a sharp tool (d) a small nut or washer
3. 3.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
4. 4.True or false: a string is needed for the pendulum. (a) False (b) True
5. 5.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) yes, much faster (d) no, hardly at all
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a pencil and tape (d) a magnet
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) the weight of the bob (c) time for 10 swings (d) the string length
8. 8.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) turmeric powder (c) a pencil and tape (d) a string
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
10. 10.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
11. 11.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it doubles (c) it halves (d) it becomes 4 times
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the string length (c) the weight of the bob
13. 13.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a string (c) a battery cell (d) a magnet
14. 14.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) heavier (d) stopped
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) False (b) True
16. 16.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) the same hook (c) how far we pull it back (d) time for 10 swings
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) a string (d) a balloon
19. 19.🧺 Which of these is needed for the pendulum? (a) a balloon (b) turmeric powder (c) yeast (d) a stopwatch
20. 20.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a pencil and tape (c) a stopwatch (d) a heavy nut or washer
21. 21.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
22. 22.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a magnet (c) a string (d) a heavy nut or washer
23. 23.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we keep it the same (c) we measure it
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a ruler (d) turmeric powder
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the string length (c) how far we pull it back
29. 29.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we keep it the same (c) we change it
31. 31.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) it cannot swing (d) about the same
32. 32.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a heavy nut or washer (d) a mirror
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a mirror (c) a pencil and tape (d) a ruler
34. 34.True or false: a mirror is not needed for the pendulum. (a) True (b) False
35. 35.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
36. 36.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is the one thing we change. (a) False (b) True
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “how far we pull it back”? (a) we change it (b) we keep it the same (c) we measure it
39. 39.True or false: a ruler is not needed for the pendulum. (a) True (b) False
40. 40.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a shorter string (d) a heavier bob

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